diff --git a/section_2_sensor_data_processing/5_object_detection.ipynb b/section_2_sensor_data_processing/5_object_detection.ipynb
index 10780ef..783b28f 100644
--- a/section_2_sensor_data_processing/5_object_detection.ipynb
+++ b/section_2_sensor_data_processing/5_object_detection.ipynb
@@ -71,6 +71,7 @@
     "os.environ[\"CUDA_VISIBLE_DEVICES\"] = \"0\"\n",
     "\n",
     "import time\n",
+    "import cv2\n",
     "import numpy as np\n",
     "import tensorflow as tf\n",
     "from glob import glob \n",
@@ -95,13 +96,6 @@
     "MODEL_ROOT = \"object_detection/model\""
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -854,7 +848,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.6"
+   "version": "3.9.7"
   },
   "vscode": {
    "interpreter": {